Mammoth Lakes, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

344
FXUS65 KREV 052044
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
144 PM PDT Fri Sep 5 2025

.KEY MESSAGES...

* Scattered showers and thunderstorms expected through the afternoon
  across western Nevada.

* Smoke from nearby wildfires will continue to filter into the
  region, producing hazy skies and air quality impacts.

* Fall-like weather arrives next week with much cooler temperatures,
  breezy winds, and increased shower and storm chances.

&&

.DISCUSSION...

Scattered showers and thunderstorms are beginning to mature across
Mono and Mineral counties per 12 PM moisture-channel imagery.
Further t-storm development is expected through the afternoon across
western Nevada, mainly east of the Greater Reno-Carson-Minden area.
Thunderstorms will pose a risk of localized flash flooding, small
hail, gusty outflow winds, and frequent lightning until 8-9 PM PDT
before devolving into showers. All shower/storm activity should end
before 10 PM tonight. Elsewhere, skies will be mostly sunny --
albeit hazy from smoke drift originating from nearby wildfires.

A drastic change in the weather pattern remains on track to occur
over the next several days, culminating in fall-like weather during
the upcoming week. Incipient impacts begin this weekend in the form
of breezy winds and cooling temperatures. Breezy winds will couple
with low, but increasing, RH this weekend, which may result in brief
elevated to locally critical fire weather conditions in the
afternoons. Monday is favored to be the windiest day when most areas
have at least a 50% chance of gusts exceeding 30 mph. Fortunately,
higher humidity should preclude a greater fire threat, but perhaps a
few holdover fires flare-up in response to stronger winds.

Steady cooling continues through Wednesday as temperatures become 10-
20 degrees below average. While subject to change, it`s likely that
daytime highs will only reach the 60s and 70s around midweek.
Meanwhile, shower and storm chances increase Monday and peak
Wednesday as the low pressure area directs Pacific moisture into the
region. Given the track of the low, best chances (20-40%) of showers
and t-storms favor Lassen and far N Washoe counties each day with
lesser odds to the south and east. Temperatures may even be cold
enough to allow snow flurries in the High Sierra! Low pressure lifts
away from the region at the end of next week, likely resulting in
warmer and drier weather.

-Salas

&&

.AVIATION...

Scattered showers and thunderstorms continue to be the main concern
today, although it`s likely they remain east of most TAF sites.
Instead, KMMH and KNFL-KHTH-KLOL have the best chances of
thunderstorms impacts until 03-04Z tonight. Lingering smoke will
continue to impact slantwise visibilities during the mornings and
evenings.

-Salas

&&

.REV Watches/Warnings/Advisories...
NV...None.
CA...None.
&&

$$